Trigger conversion device for rifles



March 18, 1952 M. H. COLLEY TRIGGER CONVERSION DEVICE FOR RIFLES Filed Dec. 27, 1949 Mama E m Patented Mar. 18, 1952 TRIGGER CONVERSION DEVICE FOR RIFLES Martin H. Culley, Big Delta, Territory of Alaska, assignor to the United States of America as represented by the Secretaryof the Army Application December 27, 1949, Serial No. 135,214

4 Claims. (01.42-69) (Granted under the act of March 3, .1883, as

The invention described herein may be manufactured by or for the Government forgovernmental purposes without the payment of any royalty thereon.

This invention relates to rifles and more specifically to a trigger conversion device to permit firing of a rifle under any climatic condition.

An object of this invention is to provide a rifle with a manually operated device which will enable an individual wearing heavy artic mittens or the like to fire the rifle without first having to remove the mittens.

In many instances, particularly in theaters of war, it has been found necessary either due to inclement weather or assignment requirements to wear heavy mittens or other hand gear which would prohibit engagement of the individuals finger with the trigger of the rifle until the mittens or gear was first removed. My invention referred to herein as a trigger conversion will enable the individual to fire a rifle without having to remove his mittens or other hand gear.

The specific nature of the invention as well as other objects and advantages thereof will clearly appear from the following description and accompanying drawings in which:

Figure l is a View in elevation showing the device assembled to the rifle stock and trigger.

Figure 2 is a view in elevation of the device.

Figure 3 is a plan view of the device.

Referring now to the drawings by characters of reference there is shown in Figure 1 a fragmentary view of a rifie stock in elevation and generally indicated by the reference character I and having a grip portion 2. Positioned on the underside 4 of the stock and forwardly of the arch 5 of the grip member is a trigger 6 and trigger guard I of the rifle. The trigger conversion device comprises a curved arm 8 perforated as at 9 and having ears It at one end for pivotally supporting a lever arm II. The arm II opposite its pivoted end has formed thereon a yoke I3 supporting a pivotal trigger engaging block I l. The block is substantially triangular in cross section and has its base I5 curved to conform with the curvature of the trigger 6. A pin I6 having its ends received in apertures l1 and 18 in the arms of the yoke I3 and passing through an aperture Iii in the block supports the block between the arms of the yoke.

A spring detent 20 pivoted in one arm of the yoke engages a recess 2| in one end of the pin I9 and retains the pin in engagement with the amended April 30, 1928; 370 O. G. 757) yoke and block until such time as it may be desirable to assemble or disassemble the device to the rifle-stock. As shown in Figure 1 the arm 8 is fastened to the curved portion of the grip by any suitable means such as wood screws passing through the perforations 9 into the stock and firmly attaching the arm to the stock. The arm II is then swung upward until the yoke embraces the trigger guard and is held in that position while the trigger block is placed against the trigger and its aperture alinged with the apertures in the yoke and a block pin positioned in said apertures, the pin rotatably retaining said block in said yoke and in engagement with the trigger. The spring detent 28 is then swung into position to engage the recess 2| and thereby hold the block in assembled relationship to the yoke and trigger. As can be easily seen to fire the rifle it only becomes necessary to grasp the grip of the stock and the pivoted arm, and force the arm upward to cause the trigger to rotate about its pivot.

I claim:

1. In a rifle provided with a shoulder stock having a hand grip formed therein adjacent the trigger of said rifle, said trigger projecting downwardly from the underside of said stock and surrounded by a trigger guard, a trigger conversion device comprising a pair of pivoted arms, one of said arms fastened to the underside of said grip and formed at one end with a pair of ears pivotally supporting the rear end of a second arm, the forward end of said second arm terminating in a yoke embracing said trigger and guard, said yoke being perforated adjacent its free ends, a trigger engaging block, a pin pivotally supporting said trigger engaging block received in said perforations, said block being triangular in cross section and having its trigger engaging base curved to conform to the shape of said trigger and in slidable engagement with said trigger.

2. The trigger conversion device as set forth in claim 1 wherein one arm of said yoke is provided with a spring detent rotatably fastened therein and in engagement with one end of said pin to permit assembly or disassembly of said block and yoke to said trigger.

3. In a rifle having a shoulder stock provided with a trigger projecting downwardly from the underside of said stock and surrounded by a trigger guard, a trigger conversion device comprising an arm, means for pivotally supporting one end of said arm at the underside of said stock for rotation in a plane parallel to the 3 normally vertical, longitudinal cross section of said stock, the other end of said arm terminating in a yoke embracing said trigger and said guard, a. trigger engaging block, means for removably supporting said trigger engaging block in said yoke in operative engagement with said trigger at its side remote from said first-mentioned means, said trigger being cammed into firing movement by said block in response to a force applied to said arm to move the same toward the underside of said stock.

4. In a rifle having a shoulder stock provided with a trigger projecting downwardly from the underside of said stock and surrounded by a trigger guard, a trigger conversion device comprising an arm, means for pivotally supporting one" end of said'arm at the underside of said stock for rotation in a plane parallel to the normally vertical longitudinal cross section of said stock, the other end of said arm terminating in a yoke embracing said trigger and said guard, and trigger engaging means removably supported in said yoke for operative engagement with said trigger at its side remote from said first mentioned means, said trigger being cammed into firing movement by said trigger engaging means in response to a force applied to said arm in the normally vertical direction.

MARTIN H. COLLEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 672,149 Hoehn Apr. 16, 1901 1,000,317 Alger Aug. 8, 1911 1,837,093 Andrews Dec. 15, 1931 FOREIGN PATENTS Number Country Date 14 747 Great Britain A. D. 1915 

